I'm glad to see this thread. I've been shy here, as I am merely 'pushing 50.'
I also have a Sequoia, though not a new one. It came as part of a screaming deal on a used Burley tandem; the price was so right, we figured 'why not?' I can hardly ride it; it feels like I'm a little out of control on a race horse.
Both the stoker seat on the tandem and the sequoia are already proudly sporting new Brooks saddles.